Many state legislatures are seriously considering human embryos at the earliest stages of development for legal personhood. Total abortion bans that consider humans to have full rights from the moment ...

Add Yahoo as a preferred source to see more of our stories on Google. As an evolutionary biologist whose career has focused on how embryos develop in a wide variety of species over the course of ...

The process of human ovulation has long been shrouded in mystery. We know that once or twice a month, women release tiny eggs from their ovaries into their fallopian tubes, which usher eggs into the ...

For a long time, scientists thought that human women had concealed ovulation and menstrual cycles — in other words, that nobody (aside from ourselves and the people we buy our tampons from) could tell ...

A new U.S. Department of Health and Human Services (HHS) draft Strategic Plan for 2018 through 2022 contains verbiage defining human life as "beginning at conception" (i.e. with the fertilization of ...

In a common metaphor used to describe human fertilization, sperm cells are competitors racing to penetrate a passive egg. But as critics have noted, the description is also a 'fairy tale,' rooted in ...

Last week, the Department of Health and Human Services released a draft of its latest strategic plan, which will guide the agency from 2018 to 2022. Near the top of the document, the agency presents ...

It was good to read letter writer Ben White trying to address the key question that is too often bypassed in discussions about abortion. That is, when does life begin? It is key because we value human ...

Ovulation is the point in a woman’s menstruation cycle when the egg is released from the follicle in the ovaries and begins making its way down the fallopian tube to become fertilized. Similar to the ...

The majority of fertilized eggs die and are resorbed into the body. ZEISS Microscopy/Flickr, CC BY-SA As an evolutionary biologist whose career has focused on how embryos develop in a wide variety of ...